> I havent had a look at the patch yet since I dont have a nice editor right > now, but how do you handle inter operability between datatypes? > Specifically, how do you handle those datatypes which have a different name > from the PostgreSQL name for them and/or are stored in a different manner?
Do you mean in general, or for the postgres_fdw specifically ?
In general, only valid column types should be accepted in the CreateForeignTableStmt. The CreateForeignTableStmt is passed through DefineRelation, which takes care of looking up the actual data types.
For the postgres_fdw POC implementation, this is done by parsing the attributes type from the query result with the regtype input functions. The attribute typmod is injected too.
I actually meant in general. Thanks for the reply.
So please help me understand here. How exactly does CreateForeignTableStmt help in type compatibility? A statement may be valid on a foreign server but may not be compatible.
